lab4 finished
project 1 starts
 part(I) scratch version, not fully working
Not fully working, but can run SimText
part I finished, default value of SimText seems to generate ocean not dieing
lab5 finished
hw4 started
 finish hw4 part I, having a working DList
finish hw4
add double linked list data structure
add Record, which is for RunLengthEncoding record
finish project 1